tg3: Assign flags to fixes in start_xmit_dma_bug

This patch adds a flag for each bug workaround in
tg3_start_xmit_dma_bug().  This is prep work for the following patch.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index bab7940..b603810 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2759,6 +2759,8 @@
 #define TG3_FLG3_TOGGLE_10_100_L1PLLPD	0x00008000
 #define TG3_FLG3_PHY_IS_FET		0x00010000
 #define TG3_FLG3_ENABLE_RSS		0x00020000
+#define TG3_FLG3_4G_DMA_BNDRY_BUG	0x00080000
+#define TG3_FLG3_40BIT_DMA_LIMIT_BUG	0x00100000
 
 	struct timer_list		timer;
 	u16				timer_counter;